UMS-Shear Pin Design

The Ultimate MagnumSpike! has all the same exceptional features found on the original MagnumSpike! In addition, it incorporates a patented pin-shear design that facilitates the smooth, friction-free release of spikes into the tire. The pins hold the suspended spikes firmly in place releasing only those spikes that are run over thereby preventing loss of additional spikes from the system, making the system even more user friendly.